export const isMobile = () => {
    let flag = navigator.userAgent.match(
      /(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i
    );
    if (flag === null) {
      return false;
    } else {
      return true;
    }
}